A collection officer's primary responsibility is to manage and ensure timely collection of payments from clients. This involves tasks like contacting debtors, negotiating payment plans, resolving discrepancies, and maintaining accurate records of all collection activities.

A sales manager's primary responsibility is to lead a sales team to achieve revenue targets by developing and implementing effective sales strategies, coaching and motivating team members, and analyzing sales data to identify areas for improvement. They also play a crucial role in recruiting, hiring, and training new salespeople, as well as managing the sales pipeline and forecasting sales.